USB3500 datasheet(8/45 Pages) MICROCHIP

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USB3500

DS00002103A-page 8

 2005 - 2016 Microchip Technology Inc.

ID_DIG

Output

High

ID Digital. Indicates the state of the ID pin.

0: connected plug is a mini-A

1: connected plug is a mini-B

IDPULLUP

Input

High

ID Pull-up. Enables sampling of the analog ID line.

Disabling the ID line sampler will reduce PHY power

consumption.

0: Disable sampling of ID line.

1: Enable sampling of ID line.

VSS

Ground

N/A

PHY ground.

CLKOUT

Output,

CMOS

N/A

60MHz reference clock output. All UTMI+ signals are

driven synchronous to this clock.

VSS

Ground

N/A

PHY ground.

LINESTATE[1]

Output

N/A

Line State. These signals reflect the current state of

the USB data bus in FS mode. Bit [0] reflects the state

of DP and bit [1] reflects the state of DM. When the

device is suspended or resuming from a suspended

state, the signals are combinatorial. Otherwise, the

signals are synchronized to CLKOUT.

[1]

[0]

Description

0: SEO

1: J State

2: K State

3: SE1

LINESTATE[0]

Output

N/A

VDD1.8

N/A

1.8V regulator output for digital circuitry on chip. Place

a 0.1uF capacitor near this pin and connect the

capacitor from this pin to ground. Connect pin 27 to

pin 49.

VDD3.3

N/A

3.3V PHY Supply. Provides power for USB 2.0

Transceiver, UTMI+ Digital, Digital I/O, and

Regulators.

HOSTDISC

Output

High

Host Disconnect. In HS Host mode this indicates to

that a downstream device has been disconnected.

Automatically reset to 0b when Low Power Mode is

entered.

DISCHRGVBUS

Input

High

Discharge VBUS through a resistor to ground.

0: do not discharge VBUS

1: discharge VBUS

SESSEND

Output

High

Session End. Indicates that the voltage on Vbus is

below its B-Device Session End threshold.

0: VBUS > VSessEnd

1: VBUS < VSessEnd

TABLE 2-1:

USB3500 PIN DEFINITIONS (CONTINUED)

Name

Direction,

Type

Active

Level

Description

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